Set-shift parallel ruler



.June 21, 1'921.

Lamm

A. MORRIS ET AL sm' SHIFT PARALLEL nULEn Filed geb. 12. 1926 {Shoots-Sheet 1 A. MORRIS ET AL4 SET SHIFT PARALLEL RULBR' .im 2i,1927. i 1,633,493

Find Feb. 12. 192e. z .Sheng-sheet 2 l Patented June 21, 1927.

UNITED STATES ALEXANDER MORRIS AND vIcToRTA L. MORRIS, or sAN FRANcIsoo,.cALrFoRNIA.`

ASET-SHIFT PARALLEL IRULER.

Application led February 12,1926. Serial No. 87,887.

This invention relates to improvements in drawing instruments and hasparticular reference to a device for holding drawing instruments such as triangles, irregular curves orsuch other instruments as may be designed to assist in forming a line.

Another object of this invention is to produce a device of this character which is easy to manipulate, convenient in arrangement and accurate in repeating lines which have been established.

An additional object of this .invention is' to produce a device wherein the section lines'may be uniformly constructed having intervals of a definite measurement, thus avoiding the tedious loss of time usually experienced in section line work.

Another object is to provide means whereby the drawing tools may be nested in the device so as to facilitate the transportation of the same.

A still further object of this invention is to produce a device of the character described which is simple in construction, economicalfto manufacture, compact in the arrangement of its parts and highly efiicient in operation.

@ther objects and advantages will be apparent during the course of the following so description.

In the accompanying drawings forming a part of this specification, and in which like numerals are lemployed to designate like like parts throughout the same,

Figure y1 is a top planview of our device showing the same in actual use and partly broken away,

Figure 2 is a. rear view of the box-like structure, 1

Figure 3 is a front-elevation of' Figure 1,

Figure 4 is an enlarged detail cross ysection taken on the line 4-4 of Figure 5, showing the handle 36 in cross section,

Figure. 5 is an enlarged detail cross section taken on theline 5-5 of Figure 4, and showing the operating mechanism,

Figure 6 is a cross section taken on the line 6-6 of Figure 5, Y

Figure 7 is a bottom plan view of the actuating wheel, and

Figure 8 is a fragmentary detail view showing the ratchet mechanism.

In the accompanying drawing wherein for i the purpose of illustration is shown a preferred embodiment of our invention, the

numeral o' designates a box-like structure having a hinged lid 6. Within this boX- like structure, pencils 7 maybe placed or )Ether drawing instruments, as the case may At 8, we have shown a partition extending the length of the boXlike structure so as to form a compartment 9 in whichthe rack 11` is adapted to operate. This rack is secured to a substantially V shaped plate 12, which plate is, in turn, secured to a filler `13 adapted to be vslidably, held in a slot 14 formed longitudinally along the rear face of the box-like structure. c

A plate 16 is,rin turn, -secured to thev filler 13`and has a base portion 17 formed at right angles thereto.

Referring now to Figures land 3, it will be noted that the plate 16 has extending outwardly therefrom, triangular shaped lugs 18 and '19,'through which slidably supported bolts 21 pass. thereon springs 22 and have their .lower eX- tremity secured to a bar` 23, which is U- shaped as best noted in Figure 5. The purposel of forming this bar 23 in a U.forma tion is to retain a rubber gripper 24 therein. This rubber gripper is adapted to contact a rubber sheet 26 which is held to the plate 16 by a plate 27. This plate 27 is so formed as to have thereon a series of retaining slides 28. `These retaining slides extend over and engage the bar 23.

At 29 we have shown a handle which is attached to the bar 23 in such a manner that when the handle 29 is lifted upwardly the bar 23 will be raised against theaction of the springs 22. v

Again referring to Figure 5, it will be noted that the gear 31 meshes with the rack 11,.,which gear' is secured to a shaft 32 eX- tending upwardly through. the box-like structure and rotatably held in a bearing 33.

-The upper1 end of this shaft is squared as -at 34 so as to retain thereon a knurledactuating wheel-f36. This actuating wheel is provided with a plurality of Vnotches 37,

upon onev side thereof and a .plurality of notches 38 on the opposite side thereof. The V-shaped plate 12 before referred to serves to take up lost motion of the rack 11 against the gear 31. y

By viewing Figure 3, is will be noted that v the notches 38 are spaced a considerable distance apart, while the notches 37 are in These bolts ,have coiled vclose proximity to each other. This actuating wheel is. retained upon the Shaft 32, by a retaining nutf 394; l

At 41 we have shown a ratchet tooth mountedv upon aspring 42 which vis secured to'the top of' the box-like structure, as at 43. The numeral 45 indicatesbuffersv vprovided on the bottom of the box which Vserve to prevent a marringr; of.- the work upon which the box may rest.

By 110W: manipulating the actuating wheelV 36j,VV the angle` maybe moved along the device, with the result tha-.t a. series of parallel lines may be drawn as shownat Gili-nf Figure 1, on at; 1D as the ease may be, ity being assumed thatthe angle has been turned to a different position previous: to the drawing of the lines D.

Off'course, it is possible to employ7 two angies iny the. device at thel saine time. When it is: desired to=vary1 the spaces between the lines beingA drawn, the opera-tor may turn the `operating wheel so-l that two click-s of the ratchet are hea-rd instead ofone, or by remioifiing theaoperating wheel and turning the same over, a different spacing may. be accomplishedi.

lit` will) thus be seen that we have constructed a device which will accomplish. all ofthe objects above, set forth. n

itis to be understood that/the form of our invention herewith shown and described is to be taken as a preilerrled example of the saine,y andthat various. changes inl theshape, size and' arrangement of parts, maybe resorted to without departing from the spirit of the invention or the scope of the sube joined claims. Y Y Having thus' described' our invention, we

1. A' device of thech-araetei; described 'comprising means. forming a supporting surface, arack bar slidabl'y mounted' on said surface, means.supporting said bar comprisi'ng an elongated neem-bear angular in caressh sectien secu-red' toV and movable therewith, nieallfis;` mounted on, said first-named fer mevr-ng; said rackbai iin Sticcessiw SQPS,

nected` te. saidygrippingmeans, and means Y for successively moving said rack bar comprising a shaft pivotally mounted-in said structure, a gear fixed to said Vsha-ftl andi adapted to mesh;V with saidA rack bar, a-nd; rotatable member fen actuatingfsaid; shaft.l

3. Ai device. ofthe character described, ai box-like structure. having a sloty formedyin one sidethereof, a 'fillerslidable in said; slot, ajsubstantially Vf-.shaiped plateV secured to saidrfiller insidesaidfstructure, a rack balise. cuidad,v to said V-shaped plate, .an angular platey secured to said filler; exteriorly: of said structure, a sea-1' mounted? inthefbox: adapted to, mesh with.; said, rack bar', manually actu-v able means for rotating said, gear in successivesteps, so as tey move said rac'lrbar longiti1di=nally`a U-shaped bar secured tosaiid ana guiar plate, resilient gripping membersesk cured; tov said bar, and a handle for moving said gripper into and. out of, contact' with sai-df angular pla-te.

4. A device of the character described, a box-alikel structure having a slot formed in one side thereof, a filler slifdable in said slot', a substantially V-sha'ped plate secured to saidV filler inside said structure, a rackrbar secured tol said V\shape,d plate, anfangula-r plate secured to said filler eriteriorlyv of sai-d structure, .a gean mounted in, thev box and adapted to mesh with said rack bar, manu.- ably actuable means carried by saidstructune for rotating said gear inv successive steps so as to 'mov-e' said rack bar-longitudinalllyf,f a Ui-shaped bar securedto, saidy angTular plate, a resilient gripping member secured to said bar, ahandle for moving said g-iiipperinteV andi out of contactwith said angular plate, said manually0 loperating means: including a detachable, actuating wheel equipped with notches on its-upper and lower surfaces, and. meanspositionedlon said box-like structure: and co-eperating with the notches 'on one side ofj the actuating wheel for audibly indicating the degree. of .movement eff saidactuating wheel. 1'

In testimfeny-qwhereof we aix ont signatures. f i f MORBS. VICTORIA MORSr. 

